/*
   Copyright (c) 2011, 2012 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-18 Marco Riccardi - initial implementation
 *  2012-04-06 Marco Riccardi - added message in DliParseException
 *
 */
package org.mizartools.dli;

import java.util.LinkedList;

public class ProperDefiniens {

	private LinkedList<Part> partList = new LinkedList<Part>();
	private Formula formula = null;
	private Term term = null;

	private ProperDefiniens(){}

    public ProperDefiniens(LinkedList<Part> partList, Formula formula, Term term) throws DliException {
		if (partList == null){
			throw new DliException();
		}
		this.partList = partList;
		this.formula = formula;
		this.term = term;
    }
	
	public static ProperDefiniens newInstance(String string) throws DliParseException {
		ProperDefiniens properDefiniens = new ProperDefiniens();
		int position = string.indexOf("(");
		if (position == -1) {
			throw new DliParseException("["+string+"] is not valid in ProperDefiniens");
		}
		if (!string.substring(0, position).equals("$proper_definiens")){
			throw new DliParseException("["+string+"] is not valid in ProperDefiniens");
		}
		string = string.substring(position+1, string.length()-1);
		int positionComma = Utility.searchSeparationComma(string);
		while (string.startsWith("$part")) {
			if (positionComma == -1) {
				properDefiniens.partList.add(Part.newInstance(string));
				return properDefiniens;
			} else {
				properDefiniens.partList.add(Part.newInstance(string.substring(0, positionComma)));
				string = string.substring(positionComma+1);
				positionComma = Utility.searchSeparationComma(string);
			}
		}
		if (positionComma != -1) {
			throw new DliParseException("["+string+"] is not valid in ProperDefiniens");
		}
		if (Formula.isFormula(string)){
			properDefiniens.formula = Formula.newInstance(string);
		} else {
			properDefiniens.term = Term.newInstance(string);
		}
		return properDefiniens;
	}
	
	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append("$proper_definiens(");
		boolean isFirst = true;
		for (Part part : partList){
			if (isFirst) isFirst = false;
			else sb.append(",");
			sb.append(part.toString());
		}
		if (formula != null) {
			if (!isFirst) sb.append(",");
			sb.append(formula.toString());
		} 
		if (term != null) {
			if (!isFirst) sb.append(",");
			sb.append(term.toString());
		}
		sb.append(")");
		return sb.toString();
	}
	
}
